[time-nuts] OT - DC-10 gyros

[J. Forster]

It was almost certainly for powering a WWII vintage fluxgate compass system.

-John

==============



> I have a little dynamotor somewhere which makes 3 phase 400 Hz. Tiny
> little
> thing!  Only puts out like 15 VA, and not very noisy either.  IIRC is was
> called
> an "Instrument inverter"
>
>
>
> On 3/27/2013 9:55 PM, Bob Camp wrote:
>> Hi
>>
>> If three phase is actually needed, I'd suggest something like a cheap
>> PIC with three PWM outputs. Fairly simple R/C's on the outputs should be
>> plenty good enough to filter out any crud. Good frequency stability /
>> accurate phase shift / cheap. What's not to like 
.
>>
>> Bob
>>
>> On Mar 27, 2013, at 9:44 PM, kb0ebg at juno.com wrote:
>>
>>> Bill Ezell;
>>>
>>> Your Gyro may require 3 phase, 400 cps, 28 vac, Sine wave.
>>>
>>> A simple "Buffered Phase Shift Oscillator" for 400 cps can create the
>>> Sine Wave.
>>> https://www.circuitlab.com/circuit/h6v28g/buffered-phase-shift-oscillator/https://www.circuitlab.com/circuit/bakd83/phase-shift-oscillator-ii/You
>>> will need to add an AGC to the output for frequency stability.
>>> A "3 Phase Generator" can create the 3 phase
>>> output.https://www.circuitlab.com/circuit/m4u5nw/3-phase-generator/ Add
>>> 3 Amplifiers (one for each phase) to reach voltage/power.
>>> If the Gyro is directional, it will take several hours to stabilize.
>>>
>>> Carl
>>> ____________________________________________________________
>>> Refinance your home now
>>> Loans under 729K usually qualify for US GOV backed refinance programs
>>> http://thirdpartyoffers.juno.com/TGL3131/5153a0bf2812c20bf6124st04duc
>>> _______________________________________________
>>> time-nuts mailing list -- time-nuts at febo.com
>>> To unsubscribe, go to
>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>> and follow the instructions there.
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
>>
>> -----
>> No virus found in this message.
>> Checked by AVG - www.avg.com
>> Version: 10.0.1430 / Virus Database: 2641/5707 - Release Date: 03/27/13
>>
>>
>>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>